Submissive Cuckold

I started noticing what appeared to be a strong forbidden attraction between my girlfriend & her nephew. Her half brothers son. I started asing questions about their unusually close time they'd spent around each other , mostly getting high & at times crashing & or living under the same roof. Too much alone time for an aunt & nephew i thought. I noticed more & more how sher reacted when his name was mentioned. She seemed to almost light up with embarrassment & not look me in the eyes. It was almost a look of betrayal . So one night we're sitting in the bed & I brought his name up . I asked her how they got along having to live together & be around each other a lot. She told me he thought of her as a mother figure sometimes asking het for advice. I thought to mysref yeah i bet he does. To my suprise she started talking about him & his gf being swingers. This was a new one on me. I immediately thought of mother figure & swinger & what then come to mind? A milf & i was sure now that was how he saw her. 15 years older blonde sexy build big tits and plenty of time for sex. I then asked her if he'd ever tried anything on her. Her answer was no & I didn't really expect anything else, even though my instincts said she wasnt being truthful. The next morning she told me that she needed to go stay with her sister a day or two to help her with some personal things. I knew right the without a doubt we'd talked him up last night & she couldn't stop thinking about him. He lives within a few minutes from her sisters place making it convenient & easy for both of to sneak off together without anybody ever suspecting a thing , except me of course. His gf worked nightshift & was usually gone most evenings, leaving him to pretty much do as he pleased & that he did. And so did she... I soon found out from her sister's bf that the two of them left together almost every time she came over. He wasnt sure where they'd go or what they did but he said they were always gone at least 2 or 3 hours & sometimes even longer . So now that i have this info I decide to look into it. That night after i dropped her at sisters place instead of driving back home i decided to lay low at the apartment complex & see what happens. Sure enough almost like clockwork he shows up & runs inside. After ony a minute or so they both came out & got in his truck leaving almost in a rush. I'd noticed she was dressed different than she had been. Her bluejeans had been replaced by a short black skirt & black pantyhose with a silky looking red top. I instantly became hard thinking about her long sexy legs & feet & how good she used them on me. My thoughts went to how good she was about to use them on him as i felt myself being cosumed with jeolousy envy & a deep strong insecurity . I was so jeoius of him it hurt. My balls ached for a release & i knew then 100% they were about to go fuck
I followed them the short drive to his place⁴ & watched them quicky go inside ³ I parked in a fied,& started walking towards the traier. Thats when i heard the loud noises of unrestrained sex unlike I'd ever heard before . Her tone revealed her desperation filled lust as he pounded her so isanely fast & hard the whoe trailer shook like an earthquake. I maaged to find a peephole through the blinds & continue watching this real life pornflic that blew them all away. With her skirt down & the rest of her clothes half on half off i watched in amazement as he gave her one orgasm after another with his way bigger than average huge pornstar size cock burying deep & slamming her brutality over and over. I found myself cummiing uncontrollably all over mysef time & again taking my breath away & blowing my mind repeatedly. Finally they finished with him giving her a super massive long lasting cumshot that went ovef her face before landing on almost every inch of her body. Ropes of cum splattered her nylon covered legs & feet as he sprayed her nonstop so from then on things continued & i soon confessed to her what i had saw & watched that night. Ive been watching ever since & it only gets better